Comparing ecoregional classifications for natural areas management in the Klamath Region, USA
Daniel A. Sarr, Andrew Duff, Eric C. Dinger, Sarah L. Shafer, Michael Wing, Nathaniel E. Seavy, John D. Alexander
2015, Natural Areas Journal (35) 360-377
We compared three existing ecoregional classification schemes (Bailey, Omernik, and World Wildlife Fund) with two derived schemes (Omernik Revised and Climate Zones) to explore their effectiveness in explaining species distributions and to better understand natural resource geography in the Klamath Region, USA. We analyzed presence/absence data derived from digital distribution...
Downscaling global land-use/land-cover projections for use in region-level state-and-transition simulation modeling
Jason T. Sherba, Benjamin M. Sleeter, Adam W. Davis, Owen P. Parker
2015, AIMS Environmental Science (2) 623-647
Global land-use/land-cover (LULC) change projections and historical datasets are typically available at coarse grid resolutions and are often incompatible with modeling applications at local to regional scales. The difficulty of downscaling and reapportioning global gridded LULC change projections to regional boundaries is a barrier to the use of these datasets...
Climate-induced lake drying causes heterogeneous reductions in waterfowl species richness
Jennifer K. Roach, Dennis B. Griffith
2015, Landscape Ecology (30) 1005-1022
ContextLake size has declined on breeding grounds for international populations of waterfowl.ObjectivesOur objectives were to (1) model the relationship between waterfowl species richness and lake size; (2) use the model and trends in lake size to project historical, contemporary, and...
USGS National Wildlife Health Center quarterly mortality report January 2015 to March 2015
Anne Ballmann, Barbara L. Bodenstein, Robert J. Dusek, Daniel A. Grear, Jennifer G. Chipault
2015, Wildlife Disease Association Newsletter 4-6
No abstract available....
Global volcanic hazards and risk
S. K. Brown, S. C. Loughlin, R. S. J. Sparks, C. Vye-Brown, J. Barclay, E. Calder, E. Cottrell, G. Jolly, J.C. Komorowski, Charlie Mandeville, C. Newhall, J. Palma, S. Potter, G. Valentine
S. C. Loughlin, R. S. J. Sparks, S. K. Brown, S. F. Jenkins, C. Vye-Brown, editor(s)
2015, Book chapter, Global Volcanic Hazards and Risk
An estimated 800 million people live within 100 km of an active volcano in 86 countries and additional overseas territories worldwide [see Chapter 4 and Appendix B]1. Volcanoes are compelling evidence that the Earth is a dynamic planet characterised by endless change and renewal. Humans have always found volcanic activity...
Spatial and temporal variability in growth of southern flounder (Paralichthys lethostigma)
Stephen R. Midway, Tyler Wagner, Stephen A. Arnott, Patrick Biondo, Fernando Martinez-Andrade, Thomas F. Wadsworth
2015, Fisheries Research (167) 323-332
Delineation of stock structure is important for understanding the ecology and management of many fish populations, particularly those with wide-ranging distributions and high levels of harvest. Southern flounder (Paralichthys lethostigma) is a popular commercial and recreational species along the southeast Atlantic coast and Gulf of Mexico, USA. Recent studies have...
Is income breeding an appropriate construct for waterfowl?
Adam K. Janke, Michael J. Anteau, Nicholas Markl, Joshua D. Stafford
2015, Journal of Ornithology (165) 755-762
Breeding birds use a range of nutrient accumulation and allocation strategies to meet the nutritional demands of clutch formation and incubation. On one end of the spectrum, capital breeders use stored nutrients acquired prior to clutch formation and incubation to sustain metabolism during reproduction, while on the opposite end, income...
Gemstones 2014
Donald W. Olson
2015, Mining Engineering (67) 31-31
No abstract available....
Habitat quality from individual- and population-level perspectives and implications for management
Than J. Boves, Amanda D. Rodewald, Petra Bohall Wood, David A. Buehler, Jeffrey L. Larkin, T. Bently Wigley, Patrick D. Keyser
2015, Wildlife Society Bulletin (39) 443-447
Many wildlife management prescriptions are either implicitly or explicitly designed to improve habitat quality for a focal species, but habitat quality is often difficult to quantify. Depending upon the approach used to define and identify high-quality habitat, management decisions may differ widely. Although individual-level measures of habitat quality based on...
Nitrogen-Ammonia, 2014
Lori E. Apodaca
2015, Mining Engineering (67) 31-31
No abstract available....
Strontium, 2014
Joyce A. Ober
2015, Mining Engineering (67) 31-31
No abstract available....
Evidence of a higher late-Holocene treeline along the Continental Divide in central Colorado
Paul E. Carrara, John McGeehin
2015, The Holocene (25) 1829-1837
Using a combination of 23 radiocarbon ages and annual ring counts from 18 Rocky Mountain bristlecone pine (Pinus aristata) remnants above the local present-day limits, a period of higher treeline has been determined for two sites near the Continental Divide in central Colorado. The highest remnants were found about 30 m...
Potash, 2014
Stephen M. Jasinski
2015, Mining Engineering (67) 31-31
No abstract available....
Evaluating the relationship between biomass, percent groundcover and remote sensing indices across six winter cover crop fields in Maryland, United States
Kusuma Prabhakara, W. Dean Hively, Greg W. McCarty
2015, International Journal of Applied Earth Observation and Geoinformation (39) 88-102
Winter cover crops are an essential part of managing nutrient and sediment losses from agricultural lands. Cover crops lessen sedimentation by reducing erosion, and the accumulation of nitrogen in aboveground biomass results in reduced nutrient runoff. Winter cover crops are planted in the fall and are usually terminated in early...
Can orchards help connect Mediterranean ecosystems? Animal movement data alter conservation priorities
Theresa M. Nogeire, Frank W. Davis, Kevin R. Crooks, Brad H. McRae, Lisa M. Lyren, Erin E. Boydston
2015, American Midland Naturalist (174) 105-116
As natural habitats become fragmented by human activities, animals must increasingly move through human-dominated systems, particularly agricultural landscapes. Mapping areas important for animal movement has therefore become a key part of conservation planning. Models of landscape connectivity are often parameterized using expert opinion and seldom distinguish between the risks and...
Water's Way at Sleepers River watershed – revisiting flow generation in a post-glacial landscape, Vermont USA
James B. Shanley, Stephen D. Sebestyen, Jeffrey J. McDonnell, Brian L. McGlynn, Thomas Dunne
2015, Hydrological Processes (29) 3447-3459
The Sleepers River Research Watershed (SRRW) in Vermont, USA, has been the site of active hydrologic research since 1959 and was the setting where Dunne and Black demonstrated the importance and controls of saturation-excess overland flow (SOF) on streamflow generation. Here, we review the early studies from the SRRW and...
Predicting redox conditions in groundwater at a regional scale
Anthony J. Tesoriero, Silvia Terziotti, Daniel B. Abrams
2015, Environmental Science & Technology (49) 9657-9664
Defining the oxic-suboxic interface is often critical for determining pathways for nitrate transport in groundwater and to streams at the local scale. Defining this interface on a regional scale is complicated by the spatial variability of reaction rates. The probability of oxic groundwater in the Chesapeake Bay watershed was predicted...
The distribution of selected elements and minerals in soil of the conterminous United States
Laurel G. Woodruff, William F. Cannon, David B. Smith, Federico Solano
2015, Journal of Geochemical Exploration (154) 49-60
In 2007, the U.S. Geological Survey initiated a low-density (1 site per 1600 km2, 4857 sites) geochemical and mineralogical survey of soil of the conterminous United States as part of the North American Soil Geochemical Landscapes Project. Three soil samples were collected, if possible, from each site; (1) a sample from...
Patterns and predictability in the intra-annual organic carbon variability across the boreal and hemiboreal landscape
Julia K. Hytteborn, Johan Temnerud, Richard B. Alexander, Elizabeth W. Boyer, Martyn N. Futter, Mats Froberg, Joel Dahne, Kevin H. Bishop
2015, Science of the Total Environment (520) 260-269
Factors affecting total organic carbon (TOC) concentrations in 215 watercourses across Sweden were investigated using parameter parsimonious regression approaches to explain spatial and temporal variabilities of the TOC water quality responses. We systematically quantified the effects of discharge, seasonality, and long-term trend as factors controlling intra-annual (among year) and...
NACSN, note 67--Application for revision of Articles 36 and 37, Lithodemic units of the North American stratigraphic code
Robert M. Easton, Lucy E. Edwards, Randall C. Orndorff, Manuel Duguet, Ismael Ferrusquia-Villafranca
2015, Stratigraphy (12) 39-45
Currently the North American Stratigraphic Code, (NACSN 2005, Article 37) sets restrictions on the use of the term “complex” for lithodemic units. With exceptions for “volcanic complex” and “structural complex,” a complex must consist of more than one genetic class of rock (i.e., sedimentary, igneous or metamorphic). Thus, the use...
Linking degradation status with ecosystem vulnerability to environmental change
David G. Angeler, Didier L. Baho, Craig R. Allen, Richard K. Johnson
2015, Oecologia (178) 899-913
Environmental change can cause regime shifts in ecosystems, potentially threatening ecosystem services. It is unclear if the degradation status of ecosystems correlates with their vulnerability to environmental change, and thus the risk of future regime shifts. We assessed resilience in acidified (degraded) and circumneutral (undegraded) lakes with long-term data (1988–2012),...
Tree mortality predicted from drought-induced vascular damage
William R.L. Anderegg, Alan L. Flint, Cho-ying Huang, Lorraine E. Flint, Joseph A. Berry, Frank W. Davis, John S. Sperry, Christopher B. Field
2015, Nature Geoscience (8) 367-371
The projected responses of forest ecosystems to warming and drying associated with twenty-first-century climate change vary widely from resiliency to widespread tree mortality1, <a id="ref-link-3"...
Point spread functions for earthquake source imaging: An interpretation based on seismic interferometry
Hisashi Nakahara, Matthew M. Haney
2015, Geophysical Journal International (202) 54-61
Recently, various methods have been proposed and applied for earthquake source imaging, and theoretical relationships among the methods have been studied. In this study, we make a follow-up theoretical study to better understand the meanings of earthquake source imaging. For imaging problems, the point spread function (PSF) is used to...
Linking state-and-transition simulation and timber supply models for forest biomass production scenarios
Jennifer Costanza, Robert C. Abt, Alexa McKerrow, Jaime Collazo
2015, AIMS Environmental Science (2) 180-202
We linked state-and-transition simulation models (STSMs) with an economics-based timber supply model to examine landscape dynamics in North Carolina through 2050 for three scenarios of forest biomass production. Forest biomass could be an important source of renewable energy in the future, but there is currently much uncertainty about how biomass...
Tracing the cycling and fate of the explosive 2,4,6-trinitrotoluene in coastal marine systems with a stable isotopic tracer, 15N-[TNT]
Richard W. Smith, Penny Vlahos, J.K. Bohlke, Thivanka Ariyarathna, Mark Ballentine, Christopher Cooper, Stephen Fallis, Thomas J. Groshens, Craig R. Tobias
2015, Environmental Science & Technology (49) 12223-12231
2,4,6-Trinitrotoluene (TNT) has been used as a military explosive for over a hundred years. Contamination concerns have arisen as a result of manufacturing and use on a large scale; however, despite decades of work addressing TNT contamination in the environment, its fate in marine ecosystems is not fully resolved. Here...
